Four-cycle explosive-engine.



PATENTED JULY 16, 1907.

H. KASTRUP.

POUR CYCLE EXPLOSIVE ENGINE.

No. s6o,547.'

APPLIOATIQN FILED AUG. 25, 1906.

V I N ;360,547.

UNITED STATES P ATENT OFFICE..

HERMAN KASTRUP, OF ST LOUIS, MISSOUR. 4

. FOUR-CYCLE nxPLosrvn-ENGmE.

tain new and useful Improvcnents in Four-ycle Explosive-Engines, ofwhich the following isa full, clear, and exact description, referencebeing had to the accompanying drawingsforning part of thisspecification.

My invention relates to a four-cycle explosiv e en gine and it has forits object to produce art engine 'of this type which is of simple andinexpensive construction and so designed as to provide'for theproduction of a high degree of power.

The drawing is a vertical sectional view of my engine.

l designates' the crank. housing of the engine, in' which is journaledthe crank shait or power shaft hay: ing afwrist 2 that has connected toit the pisten rod 3.

4 designates the cylinder of the engine which surmounts 'the eran'khousing and contains the comhus- -tion chamher 5 and is provided with aradial exhaust port 6, intermediate of the crank housing andthe head ofthe engine cylindcr, through which free 'communication from thecornhustion chainber to the exterior ofthe engine cylinder is provided'e '7 is the piston which is connected to the wrist 2 of the power shafthy the pisten rod 3 and is adapted' toopera-te in the combustion chamberon a forward stroke and be withdrawn to a position back of the exhaustport 6 when the 'burned gases from the explosive ageit are to boexhausted at its next forward movement.

8 dcsignates a three way or Tvalve hohsing that is connected to theengine cylinder adjacent to its head and through which communicationfrom a Vertical cond ucting pipo 9 connected to its lower end andleading ironi a suitable carburctcr (not shown) to the comhustionchamber 5 is ohtained, in order that the ex- 1.h sivc agent may beadmitted* to said combustion chamber.

10 is a cont'olling outerinlet valve seated in the con- .ucting-pipc 9and which is adapted to open automatically hy suction when the explosvewent is to he delivered from said pipo into the valve housing andthercfrom into the cornhusticn chamber, bu't which atothcr times remainsscatcd to prevent escape of cxpiosivc &gent ironi said pipo.

ll designatcs an inn-r inlet vsflvc contrulling comunication betw en thevalvc housing 8 and combus- Lion chanher 5, this inncr inlct'valve beingcarricd hy u rcciprocatory valve Rich: 12 that is mounted in the va'vchousing. (in the reciprcnnory valve stem exterior of the Volvo housingis a retrsctilc spring 13 that serves to normally hold the nncr inletvalve 11 to its seat. At the enter end of the 'eciprocatory valveSpecification of Letters Patent. Application filed August.25,1906.Serial Ne; 331, 966.

.Patented Jul'y 16, 1907.'

stem is a head 14 having an inclined face at its lower side.

15 designates a reciprocatory trip rod that is mounted" in a horizontalarm projecting from the side of the engine cylinder having a douhlyc'urved arm provided at its upper end with a head 16 having an inclii edface at its upper-side opposing the inclined face of the reciprocatog'yvalve stern head 14. The trip rod 15 extendsdownwardly into the powershait housing and in the .lower end of said rod is mounted ananti-friction roller 17. 18 is a cam fixed toa countershaft 19 that isgear-ed to the power shaft in a manner common in explosive' engines,and-for which no inven'tion'is her-ein claimed. This cam 18 is' iormedwith approximately Parallel 'side's and rounded forward edge andiseccentrically mounted upon the countershait 19. power shaft and`thecountershaft 19 geared to the first named power shaft, the cam 18strikes against the antifriction roller mounted in the trip rod 15 uponeach coniplete rotation of the countershaft 19, thereby causing During-the rotation-of the said trip rod to be moved outwardly or up'wardly.As 4 'the trip rod moves outwardly or upwardly its head 16 by actingagainst the head 14 oi the reciprocatory valve stem 12 serves to impartan nward -moveient'to said reciprocatory valve stem and unseat the innerinlet valve 11 at the proper time during the operation of the engine. Inthe valve housing 8 is a vertical vent openi ing 8. .This vertical ventopening is controlled by upwardly opening relief valve 20 that islooselyftted to a guide rod 21 mounted in a horizontal'suppqrt projccting into the 'cha'mber of the valve housing and is normally held toits seat by a surmounting pressure spring22. 23

is an igniter that extends into the conibustion chamber 5 beneath thehead of the engine cylinder and to which an electrical current isconducted in any suitable or well known manner for the purpose ofcreating a spark in said conbustion chamber for the igniton of theexplosive &gent delivered thereinto.

` In thepractical use of my engine the cam 18 acts to operate the triprod 15 andunseat the inner inlet valve 11 whilethepiston 7 is recedingand the charge of explosive agent is drawn into the comhustion chambenThe forward stroke of the piston then occurs immediately and theadmitted =charge is compressed in the combustion chamb er until saidcharge is ignited and exploded th ough the spark produced in the gniter23 as usual, it being understood that the ime' inlet galve 11 waspermitted to resume its seat previous to such compression and theexplosion of the explosive agrrt, due to the disengagement of the cam 18ironi the trip rod 15. Upon the return or working stroke of the pistenit passes the exhaust port G and the burned gases or products ofcombustion escape through said exhaust. port; then as the piston againmoves forwardly the cam 18 actuates the trip rod 16 with the result ofunseating the inlct vziive 11 and the bnrned 'gas present in thecombustion chanber is iorced theremm 'by the pisten into the valvehousing 8, from which it is Vented by reason of the gas pressure actingto unse't the relief vaive 20. The conbustion chanher ie thue freed ofgas and the piston immediately starts upon its return stroke. While thepiston is returnng at this time, the unseated valve 11 is held in anopen position, due to the continued engagement of the cam 18 with thetrip rod 15 and e fresh supply of expiosve &gent is cirawn into thecombus'tion chamber, the unseated valve being permitted to resume itsseat just previous to the completion of the return Stroka of the pisten;The pisten then instantly stzrts upon its forward sti-oke and theexplosive' ,agent is comp'ossed thereby in the combustion chami er inthe same manne' LS previously described, as a precedent to the ignitonand explosion of the expiosive agent in the same manner as thatprevousiy explained.

I claim?- A four-cycle expiosive engine comprising a crank housing. acyiinder having a combustion chamher provided with a -idel exhaust portand surmounting the crank housing.

" &0,547

a power shutt joii'naled in the ermk housing and having a eronk providedwith a wrist, a piston, :i pisten rod couneotlng ihe pisten with thewrist, a eounte-sha't join'- power shaft 'with the countershaft, aU-shaped cam''ormed with approximately paruliei emes and a roundedforward edge and mounted eccentricliy upon the countewshut, H. three-wayvaive hou`sing having a horizontal support projecting into the chamberthe'eof, a controliing outer iniet vaive, an inner :iulet vaive,controliing communication between the valve housing and the combustioncha-niher and having a recprocatory vaive ste-m' having; e head providedwith u iowe'.inclined face and Inonnted in the valve housing, a verticalreciprocatory trip rod having a head at its upper end provided with anupper inciiued face 'opposing the inciinod lower face of the :head ofthe reciprocutory vaLve-stem, and raised by the U-shaped cam. a guidestem nonted in the horizontal support, an ipwardiy opening relief vaivefor the Volvo housing fitted to the giide stem, a retractile spring forseating the inner iziet` valve and rew tnrning the trip rod to normalposition and a spring for seat'ng the reiief valve.

HERMAN KASTRUI" In presence of-- E. S. K IGHT. I WM. H. Sco'r'r.

naied in the emni:: housing, gear wheels connecting the,

